| 40%Ni—Ti（C,N）金属陶瓷热冲击疲劳的研究 |
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| 引用本文： | 甘莉,曾庆梅.40%Ni—Ti（C,N）金属陶瓷热冲击疲劳的研究[J].热加工工艺,1999(4):43-45. |
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| 作者姓名： | 甘莉 曾庆梅 |
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| 作者单位： | 安徽省农机鉴定站(甘莉)，合肥工业大学(曾庆梅) |
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| 摘 要： | 对４０％Ｎｉ－Ｔｉ（Ｃ，Ｎ）金属陶瓷在热冲击条件下缺口试样裂纹的形成及扩展进行了研究。结果表明，裂纹的形成存在孕育期，且随循环温度的升高，孕育期缩短，扩展速率增加；裂纹的形成与组织中陶瓷相／金属相界面微孔洞的形成有关。扫描电镜观察发现，断口形貌中存在着疲劳条纹，断裂沿陶瓷相／金属相界面及金属相中进行
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| 关 键 词： | 金属陶瓷 热冲击疲劳 断口形貌 |
Research on the Thermal Shock Fatigue Behavior of 40%NiTi(C,N) Cermets |
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| GAN Li,ZENG Qingmei.Research on the Thermal Shock Fatigue Behavior of 40%NiTi(C,N) Cermets[J].Hot Working Technology,1999(4):43-45. |
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| Authors: | GAN Li ZENG Qingmei |
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| Affiliation: | 1.Anhui Agricultural Machine Test and Evaluation Station; 2.Hefei University of Technology |
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| Abstract: | The crack formation and propagation mechanism of notch specimen of 40%NiTi(C,N) cermets under thermal shock condition has been studied.The results have shown that there is a nucleation incubation period to the formation process of crack.The incubation period and propagation rate of crack decrease with increasing the cyclic temperature.The crack formation is related to the microvoid produced at the interface of ceramics/metals.The SEM has also denoted that there are some fatigue striae on the fracture morphology.The crack propagate along the interface of ceramics/metals and in the metals. |
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| Keywords: | cermets thermal shock fatigue fracture morphology |
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